<template>
  <el-dialog
    width="500px"
    title="员工导入"
    :visible="showExcelDialog"
    @close="$emit('update:showExcelDialog', false)"
  >
    <el-row type="flex" justify="center">
      <div class="upload-excel">
        <input
          ref="excel-upload-input"
          class="excel-upload-input"
          type="file"
          accept=".xlsx, .xls"
          @change="uploadChange"
        >
        <div class="drop">
          <i class="el-icon-upload" />
          <el-button type="text" @click="getTemplate">下载导入模板</el-button>

          <span>将文件拖到此处或
            <el-button type="text" @click="handleUpload">点击上传</el-button>

          </span>

        </div>

      </div>

    </el-row>

    <el-row type="flex" justify="end">
      <!-- update:props属性名，值 直接修改 .sync修饰符的属性值 -->
      <el-button size="mini" type="primary" @click="$emit('update:showExcelDialog', false)">取消</el-button>

    </el-row>

  </el-dialog>

</template>

<script>
import { getExportTemplate, uploadExcel } from '@/api/employee'
import FileSaver from 'file-saver'

export default {
  props: {
    showExcelDialog: {
      type: Boolean,
      default: false
    }
  },
  methods: {
    // 员工导入模板
    async getTemplate() {
      const data = await getExportTemplate()
      FileSaver.saveAs(data, '员工导入模板.xlsx')
    },
    // 员工上传文件
    handleUpload() {
      // this.$refs.属性名 和 this.$refs[属性名] 等价
      this.$refs['excel-upload-input'].click()
    },
    // 监听文件改变-上传excel-关闭弹层
    async uploadChange(event) {
      console.log(event.target.files)
      // 调用上传接口
      // uploadExcel() // 参数  form-data 需要文件file
      const files = event.target.files // input的文件列表
      // 用户取消上传
      if (files.length === 0) return
      // 获取用户上传的文件
      // 生成一个formData对象
      const formData = new FormData()
      // 将文件添加到formData对象中
      formData.append('file', files[0])
      // 调用上传接口
      try {
        await uploadExcel(formData)
        // 一旦成功 重新加载数据&关闭弹层
        this.$emit('updateSuccess')
        this.$emit('update:showExcelDialog', false)
        this.$message.success('上传员工信息成功')
      } finally {
        // 清空文件选择器的值
        this.$refs['excel-upload-input'].value = ''
      }
    }
  }
}
</script>

  <style scoped lang="scss">
      .upload-excel {
        display: flex;
        justify-content: center;
        margin: 20px;
        width: 360px;
        height: 180px;
        align-items: center;
        color: #697086;
        .excel-upload-input {
          display: none;
          z-index: -9999;
        }
        .btn-upload,
        .drop {
          border: 1px dashed #dcdfe6;
          width: 100%;
          height: 100%;
          text-align: center;
          line-height: 160px;
          border-radius: 8px;
          display: flex;
          flex-direction: column;
          justify-content: center;
        }
        .drop {
          line-height: 40px;
          color: #bbb;
          i {
            font-size: 60px;
            display: block;
            color: #c0c4cc;
          }
        }
      }
  </style>
